Question

Based on this answer, of how __new__ and __init__ are supposed to work in Python,

I wrote this code to dynamically define and create a new class and object.

class A(object):
    def __new__(cls):
      class C(cls, B):
          pass
      self = C()
      return self

    def foo(self):
      print 'foo'

class B(object):
    def bar(self):
      print 'bar'

a = A()
a.foo()
a.bar()

Basically, because the __new__ of A returns a dynamically created C that inherits A and B, it should have an attribute bar.

Why does C not have a bar attribute?

Answer 1

Resolve the infinite recursion:

class A(object):
  def __new__(cls):
    class C(cls, B):
      pass
    self = object.__new__(C)
    return self

(Thanks to balpha for pointing out the actual question.)